Re: [CF-metadata] CMIP5 carbon cycle standard names

Wed, 22 Sep 2010 06:00:59 -0700 

Alison,
I see your point.
As far as I know the anthropogenic emissions data will be surface fluxes. Data are based on country level consumption of fossil fuel, they don't have the info on where in the air it is released... 
Pierre

   On 22/09/2010 13:04, [email protected] wrote:

Hi Pierre,

My thinking here was that 'anthropegenic emissions' (which presumably
include fossil fuel emissions) and 'fossil fuel' emissions themselves do
not necessarily always occur at the earth's surface.  For example,
emissions from tall chimneys and aircraft may occur at many levels in
the atmosphere.  It was not clear to me that these particular quantities
in the CMIP5 tables are intended only to account for surface emissions.
If that is the case, then we certainly need to make it clear and I agree
with your suggestion to label them as surface fluxes. So instead of
introducing

tendency_of_atmosphere_mass_content_of_carbon_dioxide_expressed_as_carbo
n_due_to_anthropogenic_emission; kg m-2 s-1
tendency_of_atmosphere_mass_content_of_carbon_dioxide_expressed_as_carbo
n_due_to_emission_from_fossil_fuel_combustion; kg m-2 s-1

I will add
surface_upward_mass_flux_of_carbon_dioxide_expressed_as_carbon_due_to_an
thropogenic_emission; kg m-2 s-1
surface_upward_mass_flux_of_carbon_dioxide_expressed_as_carbon_due_to_em
ission_from_fossil_fuel_combustion; kg m-2 s-1.

OK?

Best wishes,
Alison

------
Alison Pamment                          Tel: +44 1235 778065
NCAS/British Atmospheric Data Centre    Fax: +44 1235 446314
Rutherford Appleton Laboratory          Email: [email protected]
Chilton, Didcot, OX11 0QX, U.K.



-----Original Message-----
From: Pierre Friedlingstein [mailto:[email protected]]
Sent: 21 September 2010 16:41
To: Pamment, Alison (STFC,RAL,SSTD)
Cc: [email protected]; [email protected]
Subject: Re: [CF-metadata] CMIP5 carbon cycle standard names

Hi Alison,
Just wondering, why are the first two variables below named as
"tendency_of_atmosphere_mass_content_of..."
while all others are named as  "surface_upward_mass_flux_of_ ..."
Any reason ?
I know the "tendency..." is used for other chemical species... But

here

for CO2 variables, I think intra-consistency should be favoured. No ?

Best
Pierre

On 21/09/2010 13:40, [email protected] wrote:

Dear Jonathan and Pierre,

Thank you both for your comments on the CMIP5 carbon cycle names.
Looking back through this thread I think we have resolved all the
outstanding issues and so the following names are now accepted for
inclusion in the standard name table:



tendency_of_atmosphere_mass_content_of_carbon_dioxide_expressed_as_car

bo n_due_to_anthropogenic_emission; kg m-2 s-1


tendency_of_atmosphere_mass_content_of_carbon_dioxide_expressed_as_car

bo n_due_to_emission_from_fossil_fuel_combustion; kg m-2 s-1
surface_upward_mass_flux_of_carbon_due_to_natural_emission;     kg m-

2

s-1
atmosphere_mass_of_carbon_dioxide; kg
carbon_content_of_products_of_land_use_change; kg m-2


surface_upward_flux_of_carbon_dioxide_expressed_as_carbon_due_to_emiss

io n_from_fires_excluding_land_use_change; kg m-2 s-1


surface_upward_flux_of_carbon_dioxide_expressed_as_carbon_due_to_emiss

io
n_from_grazing; kg m-2 s-1


surface_upward_flux_of_carbon_dioxide_expressed_as_carbon_due_to_emiss

io
n_from_crop_harvesting; kg m-2 s-1


surface_net_upward_flux_of_carbon_dioxide_expressed_as_carbon_due_to_e

mi ssion_from_anthropogenic_land_use_change; kg m-2 s-1


surface_net_downward_flux_of_carbon_dioxide_expressed_as_carbon_due_to

_p

hotosynthesis_and_respiration_and_fires_including_land_use_change;

kg
m-2 s-1
carbon_flux_into_soil_from_litter; kg m-2 s-1
carbon_flux_into_soil_from_vegetation_excluding_litter; kg m-2 s-1
leaf_carbon_content; kg m-2 wood_carbon_content; kg m-2
root_carbon_content; kg m-2
carbon_content_of_miscellaneous_living_matter; kg m-2 (N.B.
'miscellaneous' means carbon content of living matter apart from

those

individually named in the preceding three items)
wood_debris_carbon_content; kg m-2 surface_litter_carbon_content; kg
m-2 subsurface_litter_carbon_content; kg m-2
fast_soil_pool_carbon_content; kg m-2

medium_soil_pool_carbon_content;

kg m-2 slow_soil_pool_carbon_content; kg m-2


surface_upward_carbon_flux_due_to_plant_respiration_for_biomass_growth

;
kg m-2 s-1


surface_upward_carbon_flux_due_to_plant_respiration_for_biomass_mainte

na
nce; kg m-2 s-1
net_primary_productivity_of_carbon_accumulated_in_leaves; kg m-2 s-1
net_primary_productivity_of_carbon_accumulated_in_wood; kg m-2 s-1
net_primary_productivity_of_carbon_accumulated_in_roots; kg m-2 s-1


surface_net_downward_flux_of_carbon_dioxide_expressed_as_carbon_due_to

_p

hotosynthesis_and_respiration_and_fires_excluding_land_use_change;

kg
m-2 s-1.

To cope with the various fractional vegetation coverage quantities

we

will use the existing standard name area_fraction and introduce new
entries of primary_evergreen_trees, secondary_deciduous_trees,
secondary_evergreen_trees, C3_plant_functional_types,
C4_plant_functional_types into the area_type table.

Best wishes,
Alison

------
Alison Pamment                          Tel: +44 1235 778065
NCAS/British Atmospheric Data Centre    Fax: +44 1235 446314
Rutherford Appleton Laboratory          Email:

[email protected]

Chilton, Didcot, OX11 0QX, U.K.

<<attachment: P_Friedlingstein.vcf>>

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